Same place



JAMES B. HENDRICKS. Improvement in Balances.

Patented F eb.13, V1872.

In venl ar.

min 666 as M 1 NITED STATES JAMES B. HENDRICKS, OF CLAYTON FFIGE,

, ILLINOIS, ASSIGNOR OF ONE-HALF HIS RIGHT TO JOSEPH BR-YSON, GI SAMEPLACE.

lMPRDi/EMENT 1N BALANCES.

Srncrnrcnrron.

To all whom it may concern:

' Be it known that I, JAMES B. HENDRICKS, of Clayton, in the county ofAdams and State of Illinois, have invented certain Improvements inAdjustable Bearings for Platform- Scales, of which the following is aspecification, reference being had to the accompanying drawing, in whichFigure l is a perspective view of one of the side shafts or bars andlever leading to the scalebeam, having my improved adjustable bearingsattached. Fig. 2 is a sectional view of the adjustable bearing.

M y invention relates to improvem cuts in the bearings of platformweighing-scales-more particularly to that class of scales forimprovements in which Letters Patent were granted to George WV. JacksonNovember 19, 1867, and whereby the bearings are made adj ustablebothlaterally and vertically without requiring the V removal of any part ofthe bearing-plates. The

invention consists in providing suitable means for securing theknife-edges on which the pivot-arms of the platform rest in a suitableslot so formed in the bearing-plates as that by the operation of screwsthey can be raised or lowcred or moved to or from the platform asufiicicnt distance for adjustment, to compensate for expansion,contraction, and wear by friction of the metals, or shrinking, swelling,or sagging of the timbers consequent on change of weather, and wear ofparts to which all such scales are more or less liable.

In the accompanying drawing, A represents a square shaft suspended alongone end of the scales. B is a lever leading to the scale-beam rod. It issecured to the shaft A near its center and braced by rods 1) b. (l O arethe stirrup-links, by which the shaft A is suspended to the frame. Theyare pivoted on knife-edges c, which project from and form part of thebearing-plates D. G is a similar stirrup pivoted in the same manner to aknife-edged plate secured to the end of the lever B for the purpose ofconnecting the lever with the scalebeam rod. The bearing-plates D aresecured one to each end of the shaft A, which passes through squareslots formed in the bearing plates for its reception. The bearing-platesare also provided with vertical slots d for the reception of theadjustable knife edges or knife-edged bearings E, the slots being widerlaterally than the bearings, as shown by the space 0, Fig. 2, so as topermit of the latter being adjusted to or from the platform as required.The bearings E'are formed with shouldersf, the under surfaces of whichare made flat to correspond with the flat upper surfaces of thebearing-plates, on which they are confined between the raised flange orguide-ways g. F is a bolt, the upper end of which is con trally securedin the bearing and from the bottom of which it projects down through andbeyond the under side of the bearingplate D. The lower end of this beltF is cut with a screw-thread and provided with a nut, 71, and plate G isa hollow screw or mandrel, of the same diameter as the slot (I, intowhich it is screwed from the under side of the plate D, which latter iscut with a screw-thread for its reception. The diameter of the slot orbore of this mandrel G is greater than the circunr ference of the bolt1*, as plainly seen by Fi 2 of the drawing, the difference correspondingwith the width of the space 6 between the bearing E and plate 1), so asto permit of the lateral adjustment before described. f. is a plateinterposed between the under side of the bearing and the hollow screw G.

The adjustment of the bearings is effected in the following manner: Whenit is desired to move the knife-edge to or from the platform, the nut his unscrewed from the bolt F, and the bearing E can then be moved in theguidc-ways to or from the stirruplinks the required distance and the nuth tightened up again to secure the bearing in position. XVhcn it isdesired to raise the knife-edge the nut h is first unscrewed, and thenthe hollow screw or mandrel G is screwed up until the bearing E iselevated the required distance, when the nut h is again tightened up andthe bearing secured in its new position.

From this arrangement of the bearings it must be obvious that theplatform resting on these knife edges can readily be adjusted when,through the effect of variable weather or ordinary wear and tear, thescale is found C, and. shaft A, substantially as and for the to operateimperfectly, and that the adjustpurpose specified. 1 ment can beaccomplished without requiring JAMES B. HENDRICKS. to remove any part ofthe bearings.

What I claim as my invention is Witnesses: The combination of bearing E,bolt F, and S. J. MOREY,

hollow screw B with bearing-plate D, stirrup J. D. WOOD.

